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Determinants of Local Progression After Computed Tomography-Guided Percutaneous Radiofrequency Ablation for Unresectable Lung Tumors: 9-Year Experience in a Single Institution

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Abstract

The purpose of this study was to retrospectively determine the local control rate and contributing factors to local progression after computed tomography (CT)-guided radiofrequency ablation (RFA) for unresectable lung tumor. This study included 138 lung tumors in 72 patients (56 men and 16 women; age 70.0 ± 11.6 years (range 31–94); mean tumor size 2.1 ± 1.2 cm [range 0.2–9]) who underwent lung RFA between June 2000 and May 2009. Mean follow-up periods for patients and tumors were 14 and 12 months, respectively. The local progression-free rate and survival rate were calculated to determine the contributing factors to local progression. During follow-up, 44 of 138 (32%) lung tumors showed local progression. The 1-, 2-, 3-, and 5-year overall local control rates were 61, 57, 57, and 38%, respectively. The risk factors for local progression were age (≥70 years), tumor size (≥2 cm), sex (male), and no achievement of roll-off during RFA (P < 0.05). Multivariate analysis identified tumor size ≥2 cm as the only independent factor for local progression (P = 0.003). For tumors <2 cm, 17 of 68 (25%) showed local progression, and the 1-, 2-, and 3-year overall local control rates were 77, 73, and 73%, respectively. Multivariate analysis identified that age ≥70 years was an independent determinant of local progression for tumors <2 cm in diameter (P = 0.011). The present study showed that 32% of lung tumors developed local progression after CT-guided RFA. The significant risk factor for local progression after RFA for lung tumors was tumor size ≥2 cm.

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Authors and Affiliations

  1. Department of Radiology, Osaka City University Graduate School of Medicine, 1-4-3 Asahi-machi, Abeno-ku, Osaka, 545-8585, Japan

    Tomohisa Okuma, Toshiyuki Matsuoka, Akira Yamamoto, Yoshimasa Oyama, Shinichi Hamamoto, Kenji Nakamura & Yukio Miki

  2. Department of Radiology, Kobe City Medical Center West Hospital, Kobe, Japan

    Masami Toyoshima

Authors
  1. Tomohisa Okuma
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  2. Toshiyuki Matsuoka
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  3. Akira Yamamoto
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  4. Yoshimasa Oyama
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  5. Shinichi Hamamoto
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  6. Masami Toyoshima
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  7. Kenji Nakamura
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  8. Yukio Miki
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Correspondence to Tomohisa Okuma.

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Okuma, T., Matsuoka, T., Yamamoto, A. et al. Determinants of Local Progression After Computed Tomography-Guided Percutaneous Radiofrequency Ablation for Unresectable Lung Tumors: 9-Year Experience in a Single Institution. Cardiovasc Intervent Radiol 33, 787–793 (2010). https://doi.org/10.1007/s00270-009-9770-9

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  • DOI: https://doi.org/10.1007/s00270-009-9770-9

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